diff --git a/samples/client/petstore-security-test/php/SwaggerClient-php/lib/Api/FakeApi.php b/samples/client/petstore-security-test/php/SwaggerClient-php/lib/Api/FakeApi.php
index 6ef959b5ebf..cd3f4ab623f 100644
--- a/samples/client/petstore-security-test/php/SwaggerClient-php/lib/Api/FakeApi.php
+++ b/samples/client/petstore-security-test/php/SwaggerClient-php/lib/Api/FakeApi.php
@@ -123,7 +123,7 @@ class FakeApi
                     "[{$e->getCode()}] {$e->getMessage()}",
                     $e->getCode(),
                     $e->getResponse() ? $e->getResponse()->getHeaders() : null,
-                    $e->getResponse()->getBody()->getContents()
+                    $e->getResponse() ? $e->getResponse()->getBody()->getContents() : null
                 );
             }
 
@@ -237,7 +237,7 @@ class FakeApi
         $_tempBody = null;
 
         if ($multipart) {
-            $headers= $this->headerSelector->selectHeadersForMultipart(
+            $headers = $this->headerSelector->selectHeadersForMultipart(
                 ['application/json', '*_/  \" =end --']
             );
         } else {
diff --git a/samples/client/petstore/php/SwaggerClient-php/lib/Api/AnotherFakeApi.php b/samples/client/petstore/php/SwaggerClient-php/lib/Api/AnotherFakeApi.php
index f3666fd393f..690831ca09e 100644
--- a/samples/client/petstore/php/SwaggerClient-php/lib/Api/AnotherFakeApi.php
+++ b/samples/client/petstore/php/SwaggerClient-php/lib/Api/AnotherFakeApi.php
@@ -124,7 +124,7 @@ class AnotherFakeApi
                     "[{$e->getCode()}] {$e->getMessage()}",
                     $e->getCode(),
                     $e->getResponse() ? $e->getResponse()->getHeaders() : null,
-                    $e->getResponse()->getBody()->getContents()
+                    $e->getResponse() ? $e->getResponse()->getBody()->getContents() : null
                 );
             }
 
diff --git a/samples/client/petstore/php/SwaggerClient-php/lib/Api/FakeApi.php b/samples/client/petstore/php/SwaggerClient-php/lib/Api/FakeApi.php
index 16fa02dd050..81e515b3ab4 100644
--- a/samples/client/petstore/php/SwaggerClient-php/lib/Api/FakeApi.php
+++ b/samples/client/petstore/php/SwaggerClient-php/lib/Api/FakeApi.php
@@ -120,7 +120,7 @@ class FakeApi
                     "[{$e->getCode()}] {$e->getMessage()}",
                     $e->getCode(),
                     $e->getResponse() ? $e->getResponse()->getHeaders() : null,
-                    $e->getResponse()->getBody()->getContents()
+                    $e->getResponse() ? $e->getResponse()->getBody()->getContents() : null
                 );
             }
 
@@ -367,7 +367,7 @@ class FakeApi
                     "[{$e->getCode()}] {$e->getMessage()}",
                     $e->getCode(),
                     $e->getResponse() ? $e->getResponse()->getHeaders() : null,
-                    $e->getResponse()->getBody()->getContents()
+                    $e->getResponse() ? $e->getResponse()->getBody()->getContents() : null
                 );
             }
 
@@ -614,7 +614,7 @@ class FakeApi
                     "[{$e->getCode()}] {$e->getMessage()}",
                     $e->getCode(),
                     $e->getResponse() ? $e->getResponse()->getHeaders() : null,
-                    $e->getResponse()->getBody()->getContents()
+                    $e->getResponse() ? $e->getResponse()->getBody()->getContents() : null
                 );
             }
 
@@ -861,7 +861,7 @@ class FakeApi
                     "[{$e->getCode()}] {$e->getMessage()}",
                     $e->getCode(),
                     $e->getResponse() ? $e->getResponse()->getHeaders() : null,
-                    $e->getResponse()->getBody()->getContents()
+                    $e->getResponse() ? $e->getResponse()->getBody()->getContents() : null
                 );
             }
 
@@ -1112,7 +1112,7 @@ class FakeApi
                     "[{$e->getCode()}] {$e->getMessage()}",
                     $e->getCode(),
                     $e->getResponse() ? $e->getResponse()->getHeaders() : null,
-                    $e->getResponse()->getBody()->getContents()
+                    $e->getResponse() ? $e->getResponse()->getBody()->getContents() : null
                 );
             }
 
@@ -1394,7 +1394,7 @@ class FakeApi
                     "[{$e->getCode()}] {$e->getMessage()}",
                     $e->getCode(),
                     $e->getResponse() ? $e->getResponse()->getHeaders() : null,
-                    $e->getResponse()->getBody()->getContents()
+                    $e->getResponse() ? $e->getResponse()->getBody()->getContents() : null
                 );
             }
 
@@ -1789,7 +1789,7 @@ class FakeApi
                     "[{$e->getCode()}] {$e->getMessage()}",
                     $e->getCode(),
                     $e->getResponse() ? $e->getResponse()->getHeaders() : null,
-                    $e->getResponse()->getBody()->getContents()
+                    $e->getResponse() ? $e->getResponse()->getBody()->getContents() : null
                 );
             }
 
@@ -2059,7 +2059,7 @@ class FakeApi
                     "[{$e->getCode()}] {$e->getMessage()}",
                     $e->getCode(),
                     $e->getResponse() ? $e->getResponse()->getHeaders() : null,
-                    $e->getResponse()->getBody()->getContents()
+                    $e->getResponse() ? $e->getResponse()->getBody()->getContents() : null
                 );
             }
 
@@ -2281,7 +2281,7 @@ class FakeApi
                     "[{$e->getCode()}] {$e->getMessage()}",
                     $e->getCode(),
                     $e->getResponse() ? $e->getResponse()->getHeaders() : null,
-                    $e->getResponse()->getBody()->getContents()
+                    $e->getResponse() ? $e->getResponse()->getBody()->getContents() : null
                 );
             }
 
diff --git a/samples/client/petstore/php/SwaggerClient-php/lib/Api/FakeClassnameTags123Api.php b/samples/client/petstore/php/SwaggerClient-php/lib/Api/FakeClassnameTags123Api.php
index f2d20e8d24a..8588d48a5e3 100644
--- a/samples/client/petstore/php/SwaggerClient-php/lib/Api/FakeClassnameTags123Api.php
+++ b/samples/client/petstore/php/SwaggerClient-php/lib/Api/FakeClassnameTags123Api.php
@@ -124,7 +124,7 @@ class FakeClassnameTags123Api
                     "[{$e->getCode()}] {$e->getMessage()}",
                     $e->getCode(),
                     $e->getResponse() ? $e->getResponse()->getHeaders() : null,
-                    $e->getResponse()->getBody()->getContents()
+                    $e->getResponse() ? $e->getResponse()->getBody()->getContents() : null
                 );
             }
 
diff --git a/samples/client/petstore/php/SwaggerClient-php/lib/Api/PetApi.php b/samples/client/petstore/php/SwaggerClient-php/lib/Api/PetApi.php
index bcdf416cf9f..410d6a42913 100644
--- a/samples/client/petstore/php/SwaggerClient-php/lib/Api/PetApi.php
+++ b/samples/client/petstore/php/SwaggerClient-php/lib/Api/PetApi.php
@@ -123,7 +123,7 @@ class PetApi
                     "[{$e->getCode()}] {$e->getMessage()}",
                     $e->getCode(),
                     $e->getResponse() ? $e->getResponse()->getHeaders() : null,
-                    $e->getResponse()->getBody()->getContents()
+                    $e->getResponse() ? $e->getResponse()->getBody()->getContents() : null
                 );
             }
 
@@ -349,7 +349,7 @@ class PetApi
                     "[{$e->getCode()}] {$e->getMessage()}",
                     $e->getCode(),
                     $e->getResponse() ? $e->getResponse()->getHeaders() : null,
-                    $e->getResponse()->getBody()->getContents()
+                    $e->getResponse() ? $e->getResponse()->getBody()->getContents() : null
                 );
             }
 
@@ -586,7 +586,7 @@ class PetApi
                     "[{$e->getCode()}] {$e->getMessage()}",
                     $e->getCode(),
                     $e->getResponse() ? $e->getResponse()->getHeaders() : null,
-                    $e->getResponse()->getBody()->getContents()
+                    $e->getResponse() ? $e->getResponse()->getBody()->getContents() : null
                 );
             }
 
@@ -851,7 +851,7 @@ class PetApi
                     "[{$e->getCode()}] {$e->getMessage()}",
                     $e->getCode(),
                     $e->getResponse() ? $e->getResponse()->getHeaders() : null,
-                    $e->getResponse()->getBody()->getContents()
+                    $e->getResponse() ? $e->getResponse()->getBody()->getContents() : null
                 );
             }
 
@@ -1116,7 +1116,7 @@ class PetApi
                     "[{$e->getCode()}] {$e->getMessage()}",
                     $e->getCode(),
                     $e->getResponse() ? $e->getResponse()->getHeaders() : null,
-                    $e->getResponse()->getBody()->getContents()
+                    $e->getResponse() ? $e->getResponse()->getBody()->getContents() : null
                 );
             }
 
@@ -1382,7 +1382,7 @@ class PetApi
                     "[{$e->getCode()}] {$e->getMessage()}",
                     $e->getCode(),
                     $e->getResponse() ? $e->getResponse()->getHeaders() : null,
-                    $e->getResponse()->getBody()->getContents()
+                    $e->getResponse() ? $e->getResponse()->getBody()->getContents() : null
                 );
             }
 
@@ -1610,7 +1610,7 @@ class PetApi
                     "[{$e->getCode()}] {$e->getMessage()}",
                     $e->getCode(),
                     $e->getResponse() ? $e->getResponse()->getHeaders() : null,
-                    $e->getResponse()->getBody()->getContents()
+                    $e->getResponse() ? $e->getResponse()->getBody()->getContents() : null
                 );
             }
 
@@ -1858,7 +1858,7 @@ class PetApi
                     "[{$e->getCode()}] {$e->getMessage()}",
                     $e->getCode(),
                     $e->getResponse() ? $e->getResponse()->getHeaders() : null,
-                    $e->getResponse()->getBody()->getContents()
+                    $e->getResponse() ? $e->getResponse()->getBody()->getContents() : null
                 );
             }
 
diff --git a/samples/client/petstore/php/SwaggerClient-php/lib/Api/StoreApi.php b/samples/client/petstore/php/SwaggerClient-php/lib/Api/StoreApi.php
index 29e4c6cf114..5df7f9f279b 100644
--- a/samples/client/petstore/php/SwaggerClient-php/lib/Api/StoreApi.php
+++ b/samples/client/petstore/php/SwaggerClient-php/lib/Api/StoreApi.php
@@ -123,7 +123,7 @@ class StoreApi
                     "[{$e->getCode()}] {$e->getMessage()}",
                     $e->getCode(),
                     $e->getResponse() ? $e->getResponse()->getHeaders() : null,
-                    $e->getResponse()->getBody()->getContents()
+                    $e->getResponse() ? $e->getResponse()->getBody()->getContents() : null
                 );
             }
 
@@ -347,7 +347,7 @@ class StoreApi
                     "[{$e->getCode()}] {$e->getMessage()}",
                     $e->getCode(),
                     $e->getResponse() ? $e->getResponse()->getHeaders() : null,
-                    $e->getResponse()->getBody()->getContents()
+                    $e->getResponse() ? $e->getResponse()->getBody()->getContents() : null
                 );
             }
 
@@ -597,7 +597,7 @@ class StoreApi
                     "[{$e->getCode()}] {$e->getMessage()}",
                     $e->getCode(),
                     $e->getResponse() ? $e->getResponse()->getHeaders() : null,
-                    $e->getResponse()->getBody()->getContents()
+                    $e->getResponse() ? $e->getResponse()->getBody()->getContents() : null
                 );
             }
 
@@ -866,7 +866,7 @@ class StoreApi
                     "[{$e->getCode()}] {$e->getMessage()}",
                     $e->getCode(),
                     $e->getResponse() ? $e->getResponse()->getHeaders() : null,
-                    $e->getResponse()->getBody()->getContents()
+                    $e->getResponse() ? $e->getResponse()->getBody()->getContents() : null
                 );
             }
 
diff --git a/samples/client/petstore/php/SwaggerClient-php/lib/Api/UserApi.php b/samples/client/petstore/php/SwaggerClient-php/lib/Api/UserApi.php
index b33f5df6544..58e0abec8c2 100644
--- a/samples/client/petstore/php/SwaggerClient-php/lib/Api/UserApi.php
+++ b/samples/client/petstore/php/SwaggerClient-php/lib/Api/UserApi.php
@@ -123,7 +123,7 @@ class UserApi
                     "[{$e->getCode()}] {$e->getMessage()}",
                     $e->getCode(),
                     $e->getResponse() ? $e->getResponse()->getHeaders() : null,
-                    $e->getResponse()->getBody()->getContents()
+                    $e->getResponse() ? $e->getResponse()->getBody()->getContents() : null
                 );
             }
 
@@ -343,7 +343,7 @@ class UserApi
                     "[{$e->getCode()}] {$e->getMessage()}",
                     $e->getCode(),
                     $e->getResponse() ? $e->getResponse()->getHeaders() : null,
-                    $e->getResponse()->getBody()->getContents()
+                    $e->getResponse() ? $e->getResponse()->getBody()->getContents() : null
                 );
             }
 
@@ -563,7 +563,7 @@ class UserApi
                     "[{$e->getCode()}] {$e->getMessage()}",
                     $e->getCode(),
                     $e->getResponse() ? $e->getResponse()->getHeaders() : null,
-                    $e->getResponse()->getBody()->getContents()
+                    $e->getResponse() ? $e->getResponse()->getBody()->getContents() : null
                 );
             }
 
@@ -783,7 +783,7 @@ class UserApi
                     "[{$e->getCode()}] {$e->getMessage()}",
                     $e->getCode(),
                     $e->getResponse() ? $e->getResponse()->getHeaders() : null,
-                    $e->getResponse()->getBody()->getContents()
+                    $e->getResponse() ? $e->getResponse()->getBody()->getContents() : null
                 );
             }
 
@@ -1009,7 +1009,7 @@ class UserApi
                     "[{$e->getCode()}] {$e->getMessage()}",
                     $e->getCode(),
                     $e->getResponse() ? $e->getResponse()->getHeaders() : null,
-                    $e->getResponse()->getBody()->getContents()
+                    $e->getResponse() ? $e->getResponse()->getBody()->getContents() : null
                 );
             }
 
@@ -1273,7 +1273,7 @@ class UserApi
                     "[{$e->getCode()}] {$e->getMessage()}",
                     $e->getCode(),
                     $e->getResponse() ? $e->getResponse()->getHeaders() : null,
-                    $e->getResponse()->getBody()->getContents()
+                    $e->getResponse() ? $e->getResponse()->getBody()->getContents() : null
                 );
             }
 
@@ -1541,7 +1541,7 @@ class UserApi
                     "[{$e->getCode()}] {$e->getMessage()}",
                     $e->getCode(),
                     $e->getResponse() ? $e->getResponse()->getHeaders() : null,
-                    $e->getResponse()->getBody()->getContents()
+                    $e->getResponse() ? $e->getResponse()->getBody()->getContents() : null
                 );
             }
 
@@ -1751,7 +1751,7 @@ class UserApi
                     "[{$e->getCode()}] {$e->getMessage()}",
                     $e->getCode(),
                     $e->getResponse() ? $e->getResponse()->getHeaders() : null,
-                    $e->getResponse()->getBody()->getContents()
+                    $e->getResponse() ? $e->getResponse()->getBody()->getContents() : null
                 );
             }